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Journal of Applied Physics / Volume 105 / Issue 9 / ELECTRONIC STRUCTURE AND TRANSPORT

J. Appl. Phys. 105, 093714 (2009); http://dx.doi.org/10.1063/1.3124359 (4 pages)

Generation of highly spin-polarized currents in cascaded InAs spin filters

Jan Jacob1, Guido Meier1, Sebastian Peters1, Toru Matsuyama1, Ulrich Merkt1, Aron W. Cummings2, Richard Akis2, and David K. Ferry2

1Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany
2Department of Electrical Engineering, Arizona State University, Tempe, Arizona 85287-5706, USA and Center for Solid State Electronics Research, Arizona State University, Tempe, Arizona 85287-5706, USA

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(Received 27 October 2008; accepted 26 March 2009; published online 11 May 2009)

We report the generation of highly spin-polarized currents and their detection in cascaded InAs spin filters via transport measurements below 300 mK. The intrinsic spin-Hall effect is used in the first filter to generate two oppositely spin-polarized currents. From the conductance asymmetry at the outputs of the second filter high spin polarizations are determined in all-electrical measurements. The experiments are in good agreement with ballistic quantum transport simulations, which mimic the double-Y-shaped structure constricted by quantum-point contacts.

© 2009 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. CONCEPT
  3. SIMULATIONS
  4. EXPERIMENTAL RESULTS
  5. CONCLUSION

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KEYWORDS and PACS

Keywords

ballistic transport, filters, Hall effect, III-V semiconductors, indium compounds, quantum point contacts, spin polarised transport

PACS

  • 72.25.Dc

    Spin polarized transport in semiconductors

  • 72.20.My

    Galvanomagnetic and other magnetotransport effects

  • 84.30.Vn

    Filters

  • 72.80.Ey

    III-V and II-VI semiconductors

  • 72.20.Ht

    High-field and nonlinear effects

  • 73.23.Ad

    Ballistic transport

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3124359

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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